San Diego County, San Diego Rat Control Situation:
Hi David, Is a UV blacklight still useful, exterior-wise, if it rains after the rodents leave their urine stains? I am in the process of performing exterior maintenance to better exclude my roof rats. 1) I have a 25 year old cedar shake roof in San Diego California with openings under each shake along the rake edge of the roof at the gable ends of my house. There's no drip edge, i.e. under the shakes I have roofing paper (now somewhat curled) that runs more or less up to and rests right atop the fascia board. Because I have skip sheathing, and since the cross section of a shake is a wedge that is up to one inch at the upper, thick end, this appears to create many huge entry points along the rake edges even though the sheathing is rabbeted into the fascia board. As a result, I'm thinking of getting a UV blacklight to use outside the house to sleuth for urine stains along the upper edge of the gable end shakes and fascia boards. My question is, how easily does the winter rain wash away the urine, rendering this a pointless exercise? 2) I noticed a new product called "rat-out gel" and was thinking of applying it along the rake edges mentioned above. Or, maybe I should just buy many rolls of X-Clude and use that instead. Or maybe both. Any comment? Thanks very much for your website, Doug
My response: First off, I do not have experience using UV lights to detect rat urine. But I do suspect that rain will severely limit the effectiveness of this approach. I have never heard of Rat-Out Gel or XClude, but I typically stick to physical barriers rather than repellent type devices. If your roof makes this impossible, you might have a tough time keeping the rats out.
San Diego Rat Control Tip of The Week
Reasons Why Relocated Rats Don't Survive Out Of Their Usual Territory
After trapping a rat in your home, you will have to decide either to kill it or relocate it. If killing a rat doesn't go down well with you because it makes you feel inhumane, you will be left with no other option but to relocate it.
If you have decided to relocate a trapped rat into a new territory, you need to understand the fact that it might not survive. Despite being a very smart household pest, rats find it very difficult to cope in a new environment for several reasons. The following are the reasons why a relocated rat won't survive out of their usual territory.
The first reason why rats won't survive in a new environment is that they are accustomed to their old environment. They have spent their entire life studying where they stay, knowing the exact place to find water and food in order to survive daily. Transferring this survival instinct to a new environment is a quite difficult thing to do for rats. As a result of these differences, they will find it difficult to locate food and water which they need to survive in any environment they are relocated to.
The presence of predators in the new environment is another reason why rats will find it difficult to survive. Animals like cats, snakes, and birds hunt for rats and will take advantage of the fact that the newly introduced rat doesn't know its way around to capture it.
When you introduce a rat into a new environment, it is going to meet other street rats that are already accustomed to that specific environment. Rats being animals that exhibit dominance in the form of hierarchy, where the submissive group is traumatized by the dominant rats, your rat will face multiple brutal battles and might end up in bad shape in the process. Over time, they will either get killed or too weak to look for food and shelter.
All these clearly show why any rat you decide to relocate might never survive the effects of leaving your home and being transferred into a new environment.
